Does outdoor air pollution affect indoor air quality? It could depend on buildings’ HVAC

We typically spend 80% of our time indoors, where the quality of the air we breathe depends on the age and type of building we occupy, as well as indoor pollution and outdoor pollution sources. But also playing an important role is the kind of HVAC system used to heat, ventilate and cool the building, according to new research from the University of Utah.

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